Recently I am not interested in any tracker. Because I am a little bit far from trading now. 
But in the past, I have been using the Blockfolio android app and Delta. I was very satisfied with Blockfolio than the Delta app. But recently I am out of them.
I did not try the Altpocket.io, I have just visited its web version and it seems good also. But not more than Blockfolio app to me